Part-of-Speech: Verb
Inflection: abl.V.1 = Strong verb (class 1: Ablautreihe ei/ái/i[aí]/i[aí]) [St §203; BE §172]
Streitberg 1910, p. 14713
þeihan (54,2) abl.V.1 (203) gedeihn, Fortschritte machen